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Scaling Properties of Galaxy Groups [PDF]
Universe, 2021 Galaxy groups and poor clusters are more common than rich clusters, and host the largest fraction of matter content in the Universe. Hence, their studies are key to understand the gravitational and thermal evolution of the bulk of the cosmic matter ...
Lorenzo Lovisari +3 more
doaj +7 more sources
Feedback from Active Galactic Nuclei in Galaxy Groups [PDF]
Universe, 2021 The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei ...
Dominique Eckert +4 more
doaj +2 more sources
Physical Review D, 2018 Galaxy groups, which have hardly been looked at in MOND, afford probing the acceleration discrepancies in regions of system-parameter space that are not accessible in well-studied galactic systems, such as galaxies, galaxy clusters, and dwarf-spheroidal ...
M. Milgrom
semanticscholar +5 more sources
Galaxy-galaxy weak-lensing measurement from SDSS: II. host halo properties of galaxy groups [PDF]
Astrophysical Journal, 2017 As the second paper of a series on studying galaxy-galaxy lensing signals using the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we present our measurement and modelling of the lensing signals around groups of galaxies.
Fu, Liping +12 more
core +4 more sources
The Astronomical Journal, 2014 Galaxy groups can be characterized by the radius of decoupling from cosmic expansion, the radius of the caustic of second turnaround, and the velocity dispersion of galaxies within this latter radius.
R. Brent Tully
semanticscholar +4 more sources
Evolution of galaxy groups in the Illustris simulation [PDF]
, 2016 We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively.
Dariush, Ali A. +2 more
core +3 more sources
Baryonically Closed Galaxy Groups [PDF]
The Astrophysical Journal, 2005 Elliptical galaxies and their groups having the largest L_x/L_B lie close to the locus in the L_x,L_B diagram expected for closed systems with baryon fractions equal to the cosmic mean value, f_b = 0.16.
Andreas Faltenbacher +7 more
core +6 more sources
Quantifying the role of ram pressure stripping of galaxies within galaxy groups [PDF]
Monthly notices of the Royal Astronomical Society, 2022 It is often stated that the removal of gas by ram pressure stripping of a galaxy disk is not a common process in galaxy groups. In this study, with the aid of an observational classification of galaxies and a simple physical model, we show that this ...
Tutku Kolcu +3 more
semanticscholar +1 more source
The Resolved Sunyaev–Zel’dovich Profiles of Nearby Galaxy Groups [PDF]
, 2021 Many of the baryons in galaxy groups are thought to have been driven out to large distances (≳R 500) by feedback, but there are few constraining observations of this extended gas.
Cameron T. Pratt, Zhijie Qu, J. Bregman
semanticscholar +1 more source
Accretion of galaxy groups into galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We study the role of group infall in the assembly and dynamics of galaxy clusters in ΛCDM. We select 10 clusters with virial mass M200 ∼ 1014 $\rm M_\odot$ from the cosmological hydrodynamical simulation Illustris and follow their galaxies with stellar mass M⋆ ≥ 1.5 × 108 $\rm M_\odot$.
Laura V. Sales +3 more
openaire +4 more sources